I'd like to have 3 separate module positions for top-b (or even top-c or d). Or I'd even be cool with having a whole new row that has 3 separate positions. I've tried doing what I need to with the mosaic tool with 3 separate boxes, but it's just not working for me. I'm used to having those three spots with some of the other templates I've purchased from you, and really need them this time too. I've tried using the layout tool, but I don't see a way to do this.

I appreciate any help you can provide. Thanks.

Please read the instruction:
demo.joomlaplates.com/jp_scene/docs/#6
If you want to have 3 top-a module with 100% width you have to set the module layout to "stack"

I need them all to be in a row. So I guess that means I would need to select parallel. But I see what I was doing wrong. I thought I needed to create new positions for each (i.e. top-c1, top-c2, etc.) But I see now the modules must just line themselves up next to each other in the position top-c.

Thanks for the help.